CYPEExiCEAE. 59 



culms nearly smooth, densely cespitose, slightly winged: stamiuate spike con- 

 spicuous, usually stalked: pistillate spikes few, remote, usually 2.5-4.5 cm. 

 long, loosely flowered : scales ovate to obovate, with wide scarious margins, 

 abruptly short-awned: perigynia appressed- ascending, obtusely triangular, 

 narrowly obovoid or ellipsoid, 3.5 mm. long, more or less striate, narrowed at 

 each end, the beak straight or slightly curved. — Common, in woods and 

 thickets. — Spr. and sum. 



41. C. styloflexa Buckl. Leaf -blades 3-6 mm. wide, shorter than the culm: 

 culms slender, smooth, 3-8 dm. long, usually loosely cespitose: bracts short: 

 staminate spike usually long-stalked: pistillate spikes 1-4, distant, loosely 5-10- 

 flowered, 10-20 mm. long, the lower drooping on filiform stalks: scales ovate 

 or ovate-lanceolate, acute, cuspidate or short-awned, usually reddish-brown 

 tinged, shorter than the perigynia: perigynia elliptic-fusiform, 3-angIed, many- 

 nerved, 4-5 mm. long, 1.5 mm. thick, tapering into the slender beak. — Eare, in 

 thickets. — Schists. — Spr. and sum. 



42. C. granularis Muhl. Culms tufted, slender, smooth or nearly so, 1.5-7 

 dm. long: leaves slightly glaucous; blades 3-9 mm. wide, the basal shorter than 

 the culm: bracts overtopping spikes: staminate spike sessile or short-stalked: 

 pistillate spikes 3-5, erect or slightly spreading, 1-3 cm. long, 5 mm. thick, 

 many-flowered, stalked or the upper sessile: scales ovate, acute or cuspidate: 

 perigynia ovoid or obovoid, strongly many-nerved, 2-3 mm. long, each with 

 a short, bent or nearly straight beak. — Common, in moist meadows and 

 woods. — Spr. and sum. 



43. C. oligocarpa Schk. Culms slender, roughish, 1.5-5 dm. long: leaf -blades 

 2.5-3.5 mm. wide, soft: sheaths smooth: bracts similar to the leaves: staminate 

 spike long-stalked or nearly sessile: pistillate spikes 2-4, erect or nearly so, 

 distant, loosely 2-8'-flowered, 8-24 mm. long, less than 4 mm. thick, the lower 

 filiform-stalked: scales ovate, cuspidate or short-awned: perigynia obovoid, pale, 

 2.5-4 mm. long, each narrowed into a short entire beak. — M. Eare, in woods 

 and thickets. — Limestones. — Spr. 



44. C. Hitchcockiana Dewey. Culms slender, 3-7 dm. tall: leaf -blades 3-7 

 mm. wide: bracts foliaceous, overtopping the spikes, the sheaths rough pubes- 

 cent: staminate spike commonly solitary, stalked: pistillate spikes 2-4, erect, 

 loosely 1-6-flowered, 1-2.5 mm. long: scales ovate or ovate-lanceolate, longer 

 than the perigynia, rough awned: perigynia obovoid, green, 4.5-5 mm. long, 

 obliquely short-beaked. — M. Occasional, in woods and thickets. — Limestones. 

 — Spr. 



45. C. conoidea Schk. Culms slender, 5-6 dm. tall: leaf -blades 2-4 mm. wide: 

 lower bracts similar to the leaves, their sheaths rough: staminate spike long- 

 stalked: pistillate spikes 1-3, distant, erect, oblong, 1-2.5 cm. long, 5 mm. thick, 

 the lower long-stalked: peduncles very rough: scales broadly ovate, each con- 

 tracted into a rough awn, the lower longer than the perigynia, the upper shorter 

 than or equalling them: perigynia oblong, obtusely 3-angled, acute, beakless, 

 3 mm. long, 1.5 mm. thick, the orifice entire. — Eather rare, in swamps and 

 meadows. ■ — Sum. 



46. C. grisea Wahl. Culms smooth or nearly so, 3-7.5 dm. long: leaves light- 

 green, rarely slightly glaucous, 4-7 mm. wide : bracts similar to the leaves, much 

 overtopping the spikes, their sheaths smooth: staminate spike sessile, or nearly 

 so: pistillate spikes 3-5, oblong, 8-25 mm. long, about 4 mm. thick, the lower 

 slender-stalked and distant: scales cuspidate or awned, the lower usually equal- 

 ling perigynia : perigynia 5 mm. long, 2 mm. thick, beakless. — Common, in 

 thickets and woods. — Sum. 



47. C. glaucodea Tuckerm. Similar to C. grisea, but pale and very glau- 

 cous. Culms 1.5-6 dm. long: leaf -blades 4-10 mm. wide: bracts foliaceous: 

 staminate spike sessile or nearly so : pistillate spikes 3-5, erect, densely flowered. 



